Art. II.] Brownocker, Comifevous Rocks of OMo 17 
These lists show that the brachiopods and corals are most 
abundant in the top beds, and that the blastoids are restricted 
to these beds ; that the lamellibranchs are divided about equally 
between the two horizons ; that the gastropods are nearly all 
found in the bottom beds, and that the cephalopods are re- 
stricted to this division. 
By reference to the section on Plate III, it may be seen 
that three prominent faunal zones are located, the bone-bed, the 
reef-building coral, Eridophyllum, and Spirifera acuminatai These 
are all quite constant and have been traced across the state. 
Similar faunal zones are found above the bone-bed at Delaware 
and Marion, and will be further referred to when the faunas of 
those localities are reached. 
The determined range of the fossils at Marble Cliff offers 
a means of correlating the faunas found at other localities and 
also of placing the strata;, in their proper place in the vertical 
scale, the latter point being shown by diagrams in Plate V. 
The Deer Creek Fauna. This fauna was collected at the 
extreme southern limit of the Corniferous rocks of Ohio. It 
was obtained on the farm of B. Adkins, one mile S. W. of 
Deer Creek P. O. Formerly the rock was Burned here in a 
small way for lime, and is reported to have been quarried to a 
depth of 10 feet. The rock which supplied the small kiln re- 
sembles that found at other points in central Ohio and is highly 
fossiliferous, but a few hundred yards up Deer Creek it is a 
bastard"' rock and is sparingly fossiliferous. The fauna named 
below was collected from small fragments of rocks lying around 
the old kiln. If a suitable exposure of the strata were had at 
this point, the fauna would, in all probability be much larger. 
Anthozoa. Epidophyllum verneuilanum. E. & H., Favo- 
sites gothlandicus. Lam., Zaphrentis prolifica. Bill. 
Brachiopoda. Atrypa reticularis. Linn., Chonetes mucro- 
natus. M. & H., Nucleospira concinna. H., Rhipidomella livia. 
Bill., Schizophoria propinqua. H., Spirifera gregaria. Clapp., 
Spirifera manni. H., Spirifera ziczac. H., Stropheodonta pater- 
soni. H., Stropheodonta perplana. Con., Stropheodonta sp. 
Lamellibranchiata. Conocardium cuneus. Con. 
